Rename Ci_SetTStateForGC -> _Ci_PySetTStateForGC

Summary: `Ci_SetTStateForGC` doesn't match our existing declared non-smelly symbol on 3.14. Renames it to `_Ci_PySetTStateForGC` so the smelly symbols checks should pass. The rename is applied to 3.14 and 3.15 (it's not present in 3.12 and we don't have the parallel GC ported to main).

Reviewed By: itamaro

Differential Revision: D108065272

fbshipit-source-id: 443ec6cfb99382b02d740345209edf6b7fec8f6b

Author: DinoV

Include/pystate.h

@@ -120,7 +120,7 @@ PyAPI_FUNC(void) PyGILState_Release(PyGILState_STATE);
 PyAPI_FUNC(PyThreadState *) PyGILState_GetThisThreadState(void);
 
 // Sets the thread state for multi-threaded GC
-PyAPI_FUNC(void) Ci_SetTStateForGC(PyThreadState *tstate);
+PyAPI_FUNC(void) _Ci_PySetTStateForGC(PyThreadState *tstate);
 
 /* PEP 788 -- Protection against interpreter finalization */
 

Python/pystate.c

@@ -96,7 +96,7 @@ current_fast_set(_PyRuntimeState *Py_UNUSED(runtime), PyThreadState *tstate)
 }
 
 void
-Ci_SetTStateForGC(PyThreadState *tstate)
+_Ci_PySetTStateForGC(PyThreadState *tstate)
 {
     current_fast_set(&_PyRuntime, tstate);
 }